Composition of matter



106. COMPOSITIONS, w?

COATING R PLASTIC. V atu Patented Jan. 17, 1933 1,894,628

UNITED STATES PATENT OFFICE JAMES A. MORTLAN'D AND HERBERT L. SMITH, OFTAMPA, FLORIDA COMPOSITION OF MATTER Io Drawing. Application filedJanuary 14, 1931. Serial No. 508,805. sf

This invention relates to new and useful of manipulation when used as amortar in improvements in a composition of matter and plastering. moreparticularly to a plaster used in build- After the complete mixing ofthe cement ing constructions and in the manufacture of and the groundlimestone, or other mineral what is generally known as wall boards, forfiller used, pre )ared fiber from the saw al- 55 interior and exterioruse. metto (lnodes 71521110505 or the fiber from The primary object ofthe invention is to su ar cane (Saccharum ofiomd provide an improvedplaster which is fibered 5y stlrrmg and agitating until the fi5er 1s andwhich with the addition of sand and thoroughly incorporated with theother inwater thoroughl mixed produces the buildgredients and formedinto a uniform mixture. ing plaster suita le for interior and exteriorAs stated, a prepared fiber is used and this surfaces with no additionalmaterial necesfiber is prepared by shreddin and rinding sary. the sameuntil it is a fine mass of short iiBers A further object of theinvention resides free fiom dust. in providing a. plaster of thecharacter men- The proportion of the constituent are by tioned which maybe readily applied to use weight substantially, to a ton of 2000 lbs. asand which is not. quick-settin and further follows:

one which will set faster in damp weather P H d than the usuallyutilized lime plaster. 5 Still another object resides in providing a ig5 mmem er 2 plaster which is easily manipulated and 1 saw grass or sugare 23 which forms a more perfect clinch or anchor- T t 1 5 age to thelath in buildin constructions. o a 2 O A further object resides inproviding a A fibered plaster is thus formed. This 25 plaster which isfire-resistant, water-reslstplaster, with the addition of one to twoparts, 75 f" ant, sound-deadening, an insulator and nonby volume, ofsand, thoroughly mixed with f conductor of electricity. water,constitutes a building plaster suitable With these and numerous OtherObjects in for interior and exterior surfaces, with no view, ourinvention consists in the combinaadditional material necessary. Such alastion of ingredients as hereinafter more part may b dil applied and it quick 80 ticularly referred to in the specification and tting, the s bi g a abl of setting claim. faster in damp weather than lime plaster.

Our improved com osition comprlses a This plaster is also capable ofbeing readily mechanical mixture of ortland Cement, fineand easilymanipulated and forms a perfect if ground so that not more than 15% rclinch or anchorage to the lath and to the 7 He may be retained on ascreen having interstices of the lath, the same being fire 186 186 meses per square 5 d of resistant, crumbling only under extreme finelyground lime stone or other suitable heat, water resistant, sounddeadening and stone of a mineral nature used as a filler, the an inulator, the game also being a non-constone to be ground to such a statethat not ductor of electricity. This composition may more than 15%residue may be retained on a be molded or cast in forms and possessesthe screen having 100 100 meshes per square quality of being manipulatedand formed inch. These two ingredients are thoroughly with screeds ordies. mixed together until the interstices of the This composition maybe used as a stucco ground limestone. or other mineral filler used,plaster with no added materials other than is filled with the Portlandcement, thus greatthe sand required and desired. l o lgr i r 1 g 1yincreasing the effective cementitious propmatter, such as 1 i erties ofthe cement. By separating the parmar t 1e li ticles of cement, thesetting action of said 3ect to tie choice of color desired. cement isretarded, allowing a greater range This plaster, when thoroughly mixedwith small amounts of water is a material which may be readily cast ormolded into wall boards or building blocks by means of hydraulicpresses. Such a plaster or wall board 5 may be nailed or otherwiseworked the same as a wood board. Such plaster boards may supplant theuse of lath, expanded metal or plaster bases and the plaster in thefinishing of a building, either interior or exterior or both.

As stated in the objects of the invention and in the aforesaiddescription, an important feature of the invention is the separating ofthe particles of cement when the ground limestone is mixed therewithwhich retards the setting action of the cement and allows a greaterrange of manipulation when used as a mortar in plastering. Thisparticular plaster is lighter in weight and more eifective and durablethan similar compositions now in use.

From the foregoing description of our improved composition of matter andthe method of making same, the application thereof to use will bereadily understood and it will be seen that we have provided a simple,comparatively inexpensive and very efficient means for carrying out thenumerous objects of the invention. Slight changes in form and proportionof the ingredients may be used without departing from the spirit orsacrificing any of the principles of the invention.

Having thus described the invention what is claimed is:

A composition of matter consisting of fine- 1y ground Portland cementmixed with finely ground stone, the ground stone being coarser than thecement and the cementfilling interstices of the stone and forming withthe stone a dense composition, and a mass of shredded-dust freevegetable fibers selected from the group consisting of saw palmetto andsugar cane, the ingredients being in substantially the followingproportions: Portland cement 675 pounds, ground stone 1090 pounds andvegetable fiber 235 pounds.

In testimony whereof we afiix our signatures.

JAMES A. MORTLAND. HERBERT L. SlSflTH.

